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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 283 days






2. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






3. Birthing process (termination of gestation)






4. 16-20 hours






5. Duct through penis that carries sperm and urine






6. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






7. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






8. Produce testosterone. located between the seminiferous tubules






9. (male) pushes the testes outward toward the legs for a cool-down off of the body






10. Milk ~305 days - dry 60 days prior to calving






11. 45-60 days after breeding; re-breed as required






12. ~305 days (altough often longer due to breeding difficulties)






13. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






14. 1. brain function - 2. blood flow - 3. willing female






15. Prevent the cow from getting an infection from the calve






16. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






17. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






18. 26 hours after estrus begins






19. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






20. 147 days






21. Larger the cow - more milk is produced; smaller the cow - less milk is produced






22. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






23. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






24. Animal which has been castrated after puberty






25. Male on one pin and female on other side






26. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






27. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






28. Failure to have one testis (gonad) to descend






29. Can survive ~7 days in cow. vast majority <48 hours






30. (LH) stimulates the Leydig cells to produce testosterone






31. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






32. Look for infection - split - and rupture of the penis






33. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






34. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






35. Sperm production






36. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






37. 30-38 hours after estrus cycle begins






38. Not under a timeline - cow can not be sold as steak






39. When are steers and heifers weaned from bottle feeding?






40. (male) pushes the testes upward toward the body for warmth or protection






41. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






42. Luteolysis happens because of the ____________ hormone






43. 19-23 (21) days






44. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






45. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






46. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






47. (FSH) causes egg to mature in females






48. 1-2 days






49. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






50. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract